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Kinesiology
Kinesiology Chapter 9 Shoulder Joint
63
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Undergraduate 2
01/25/2011

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Term
the shoulder joint
Definition
a ball-and-socket joint with movement in all three planes
Term
the humeral head articulating with the glenoid fossa of the scapula
Definition
what makes up the shoulder joint?
Term
scaption
Definition
motion similar to flexion or abduction but occurs in the scapular plane
Term
scapular plane
Definition
planed that is 30 degrees forward of the frontal plane
Term
glenoid fossa
Definition
on scapula; a shallow, egg-shaped socket on the superior end, lateral side; articulates with the humerous
Term
glenoid labrum
Definition
on the scapula; fibrocartilaginous ring attached to the rim of the glenoid fossa, which deepens the articular cavity
Term
subscapular fossa
Definition
on the scapula; includes most of the area on the anterior surface, providing attachment for the subscapularis muscle
Term
infraspinous fossa
Definition
on the scapula; below the spine, providing attachment for the ingraspinatus muscle
Term
supraspinous fossa
Definition
on the scapula; above the spine, providing attachment for the supraspinatus muscle
Term
axillary border
Definition
on the scapula; providing attachment for the teres major and teres minor muscles
Term
acromion process
Definition
on the scapula; broad, flat area on the superior lateral aspect, providing attachment for the middle deltoid muscle
Term
humerus
Definition
the longest and largest bone of the upper extremity
Term
head
Definition
part of humerus; semirounded proximal end; articulates with the scapula
Term
surgical neck
Definition
part of humerus; slightly constricted area just below tubercles where the head meets the body
Term
anatomical neck
Definition
part of humerus; circumferential groove separating the head from the tubercle
Term
shaft
Definition
body of the humerus
Term
greater tubercle
Definition
on humerus; large projection lateral to head and lesser tubercle; provides attachment for the supraspinatus, infraspinatus, and teres minor muscles
Term
lesser tubercle
Definition
smaller projection on the anterior surface of the humerus, medial to the greater tubercle; provides attachment for the sucscapularis muscle
Term
deltoid tuberosity
Definition
on the lateral side near the midpoint of the humerus; not usually a well-defined landmark
Term
bicipital groove
Definition
the longitudinal groove between the tubercles on the humerus, containing the tendon of the long head of the biceps
Term
bicipital ridges
Definition
on the humerus; also called the lateral and medial lips of the bicipital groove; provides attachment for the pectoralis major, latissimus dorsi, and the teres major
Term
joint capsule
Definition
thin-walled, spacious container that attaches around the rim of the glenoid fossa of the scapula and anatomical neck of the humerus
Term
glenohueral ligaments
Definition
ligaments that reinforce the anterior portion of the capsule
Term
coracohumeral ligament
Definition
ligament that attaches from the lateral side of the coracoid process and spans the joint anteriorly to the medial side of the greater tubercle; strenthens up part of capsule
Term
glenoid labrum
Definition
fibrous ring that surrounds the rim of the glenoid fossa; deepens the articular cavity
Term
rotator cuff
Definition
tendinous band formed by the blending together of the tendinous insertions of the subscapularis, supraspinatus, infraspinatus and teres minor muscles; helps keep the head of the humerus rotating against the glenoid fossa during motion
Term
thoracolumbar fascia
Definition
a superficial fibrous sheet attacihng to the spinous processes of the lower thoracic and lumbar vertebra, supraspinal ligament and the posterior part of the iliac crest; provides attachment for the latissimus dorsi
Term
acromioclavicular separation
Definition
term commonly used to describe the various amounts of ligament injury at the acromioclavicular joint
Term
the ligament is stretched
Definition
what happens in a first degree acromioclavicular sprain?
Term
the acromioclavicular ligament is ruptured and the coracoclavicular is stretched
Definition
what happens in a second-degree acromioclavicular sprain?
Term
both the acromioclavicular and coracoclavicular ligaments are ruptured
Definition
what happens in a third degree acromioclavicular sprain?
Term
clavicular fractures
Definition
account for the most frequently broken bone in children; clavicle usually breaks in its midportion
Term
humeral neck fracture
Definition
caused by a fall on the outstreched hand; common in the elderly is usually an impacted fracture
Term
midhumeral fractures
Definition
usually caused by a direct blow or a twisting force
Term
pathological fractures
Definition
may be caused by benign tumors or metastatic carcinoma from primary sites
Term
anterior shoulder dislocations
Definition
most common joint dislocation; humeral head slides out anteriorly out of the glenoid fossa
Term
glenohumeral subluxation
Definition
paralysis combined with the pull of gravity and the weight of the arm over time causes partial dislocation
Term
impingement syndrome
Definition
overuse condition that involves compression between the acromial arch, humeral head, and coracoacromial ligament of soft tissue structures such as the rotator cuff muscles
Term
swimmers shoulder
Definition
type of impingement common with swimmers
Term
adhesive capsulitis (frozen shoulder)
Definition
inflammation and fibrosis of the shoulder joint capsule leading to pain and loss of shoulder range of motion
Term
torn rotator cuff
Definition
tears that involve the distal tendinous insertion of the supraspinatus, infraspinatus, teres minor, and sucscapularis on the tubercle area of the humerus
Term
calcific tendonitis
Definition
chronic inflammation of the supraspinatus tendon can lead to an accumulation of minseral deposits and result in this
Term
bicipital tendonitis
Definition
involves the long head of the biceps proximally as it crosses the humeral head and descends into the bicipital groove; commonly ruptures
Term
deltoid muscle
Definition
superficial muscle covering the shoulder joint on three sides, giving the shoulder a rounded shape; separated into 3 parts
Term
anterior deltoid muscle
Definition
this muscle attaches on the outer third of the clavicle and runs down and out to the deltoid tuberosity
Term
abduction, flexion, and medial rotation, horizontal abduction
Definition
what motions is the anterior deltoid muscle involved in?
Term
middle deltoid muslcle
Definition
muscle that attaches on the lateral side of the acromion process and runs directly down to the deltoid tuberosity
Term
abduction
Definition
what motion is the middle deltoid muscle involved in?
Term
posterior deltoid muscle
Definition
muscle that attaches to the spine of the scapula and runs obliquely down to its attachment with the anterior and middle fibers on the deltoid tuberosity
Term
abduction, extension, hyperextension, lateral rotation, horizontal abduction
Definition
what motions is the posterior deltoid muscle involved in?
Term
supraspinatus muscle
Definition
muscle that lies above the spine of the scapula; stabilizes the head of the humerus against the glenoid fossa and is active in abduction
Term
pectoralis major muscle
Definition
large muscle of the chest that is superficial; effective in adduction and medial rotation
Term
clavicular and sternal portions
Definition
what are the two parts to the pectoralis major?
Term
latissimus dorsi muscle
Definition
broad, sheetlike muscle located on the back and attaches to the proximal, anterior and medial surfaces of the humerus
Term
extension, adduction, medial rotation, hyperextension
Definition
what motions is the latissimus dorsi involved in?
Term
teres major muscle
Definition
muscle that has its proximal attachment on the axillary border of the scapula; attaches next to the latissimus dorsi; does everything the l.d does except hyperextension
Term
infraspinatus muscle
Definition
muscle that lies below the spine of the scapula; the trapezius and deltoid muscles cover portions of it
Term
lateral rotation, horizontal abduction
Definition
what motions is the infraspinatus muscle involved in?
Term
teres minor muscle
Definition
attaches posteriorly on the greater tubercle of the humerus, and is is involved in the same motions are the infraspinatus muscle
Term
supraspinatus, infraspinatus, teres minor
Definition
what muscles are the SIT muscles?
Term
the rotator cuff
Definition
the SIT muscles are referred to as....
Term
subscapularis muscle
Definition
muscle located deep on the underside of the scapula, lying next to the rib cage; involved in medial rotation
Term
coracobrachialis muscle
Definition
muscle that derives its name from its attachments on the coracoid process on the scapula and on the humerus or "arm"; stablizes the shoulder joint
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